JP2013022510A - Pipe inner wall cleaning tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance performance for scraping deposit adhering to a pipe inner wall while smooth propulsion within a pipe is performed by a pressure difference generated before and after a pressure receiving part.SOLUTION: In this pipe inner wall cleaning tool, the pressure receiving part 3 is installed on one end side of a brush part 2 radially having brush bristles 2a capable of coming into sliding contact with an inner wall face 1a of a fluid transfer pipe 1, to enable propulsion within the pipe 1 due to a pressure difference generated before and after the pressure receiving part 3. The pressure receiving part 3 includes flexible non-woven fabrics 3A, 3B.

Description

  The present invention relates to a pipe inner wall cleaning tool for removing deposits such as mud and dust adhering to an inner wall surface of a fluid transport pipe such as a irrigation hose or a water pipe that irrigates a cultivation area or the like.

  In a conventional in-pipe cleaning tool, a rubber pig constituting a pressure receiving part is provided on one end side of a brush part in which a brush bristle group that is slidable on the inner wall surface of the fluid transport pipe is provided radially. The inside of the fluid transport pipe is driven by a pressure difference generated before and after (see, for example, Patent Documents 1 to 3).

Japanese Utility Model Publication No. 34-008882 Japanese Utility Model Publication No. 37-024121 Japanese Utility Model Publication No. 01-132290

  In this type of in-pipe cleaning tool, the outer diameter of the pig is formed slightly smaller than the inner diameter of the fluid transport pipe to be cleaned, and the sliding resistance between the outer peripheral surface of the pig and the inner wall surface of the fluid transport pipe is increased. And the inside of the fluid transport pipe is smoothly propelled with water or compressed air that is press-fitted from behind the pig.

  Therefore, only a part in the circumferential direction of the maximum diameter portion of the pig is brought into sliding contact with the inner wall surface of the fluid transport pipe, so that the scraping performance of the deposit on the inner wall surface of the pipe due to the maximum diameter portion of the pig is deteriorated. There is.

  The present invention has been made in view of the above-described actual situation, and its main problem is to scrape off deposits on the inner wall surface of the pipe while smoothly propelling the inside of the pipe by the pressure difference generated before and after the pressure receiving portion. It is in the point which provides the in-pipe cleaning tool which can improve performance.

The first characteristic configuration according to the present invention is generated before and after the pressure receiving portion by providing a pressure receiving portion on one end side of the brush portion in which the brush bristle group slidably contacting the inner wall surface of the fluid transport pipe is provided radially. A pipe inner wall cleaning tool configured to propel the inside of the fluid transport pipe with a pressure difference,
The pressure receiving portion is composed of a flexible nonwoven fabric.

  According to the above configuration, even if the outer diameter of the nonwoven fabric constituting the pressure receiving portion is formed slightly larger than the inner diameter of the fluid transport pipe to be cleaned, the fiber group located on the outer peripheral surface side of the nonwoven fabric is bent and deformed. Since it is in sliding contact with the inner wall surface of the fluid transport pipe, the sliding pressure resistance between the inner wall surface of the fluid transport pipe and the non-woven fabric can be assured. While suppressing the increase, it is possible to scrape and remove deposits such as mud adhering to the inner wall surface of the fluid transport pipe with the fibers on the outer peripheral surface side of the nonwoven fabric.

  Therefore, while smoothly propelling the fluid transport pipe by the pressure difference generated before and after the nonwoven fabric constituting the pressure receiving portion, fluid transport is achieved by the scraping action by the brush portion and the scraping action by the fibers on the outer peripheral surface side of the nonwoven fabric. The scraping performance of deposits adhering to the inner wall surface of the tube can be enhanced.

  In particular, even if the fluid transport pipe to be cleaned is a flexible synthetic resin hose, deposits can be efficiently scraped while suppressing damage to the inner wall surface of the hose.

  The 2nd characteristic structure by this invention exists in the point by which the outer diameter of the said nonwoven fabric and the outer diameter of the rotation locus | trajectory of a brush part are comprised by the same diameter as the inner diameter of a fluid transport pipe, or larger than it.

  According to the above configuration, the non-woven fabric and the brush portion configured to have the same diameter or larger than the inner diameter of the fluid transport pipe, and reliably and smoothly scrape off the deposits attached to the inner wall surface of the fluid transport pipe. be able to.

  A third characteristic configuration according to the present invention is that the nonwoven fabric is attached in a compressed state.

  According to the said structure, a density becomes high by compression of the said nonwoven fabric, and the pressure difference for a propulsion can appear reliably before and after a nonwoven fabric.

  The fourth characteristic configuration according to the present invention is such that the nonwoven fabric covered with the spiral core material can be compressed between the brush hair group at the tip of the spiral core material that sandwiches and holds the brush hair group of the brush portion, And the cap provided with the holding | maintenance part smaller than the outer diameter of the said nonwoven fabric exists in the point which is screwingly fixed.

According to the above configuration, since the pipe inner wall cleaning tool can be manufactured simply by screwing and fixing the cap in a state where the nonwoven fabric is sheathed on the spiral core material of the brush portion, the manufacturing cost of the pipe inner wall cleaning tool is reduced. Can be achieved.
Moreover, in the state in which the cap is screwed and fixed, the nonwoven fabric is compressed between the presser portion of the cap and the brush portion, and the presser portion of the cap is configured to have a smaller diameter than the outer diameter of the nonwoven fabric. The fiber group on the outer peripheral surface side of the fiber is in a state of maintaining flexibility, and the adhering matter adhering to the inner wall surface of the fluid transport pipe is good with the fiber group on the outer peripheral surface side of the nonwoven fabric deforming along the inner wall surface of the pipe Can be scraped off.

  A fifth characteristic configuration according to the present invention is that a plurality of non-woven fabrics constituting the pressure receiving portion are interposed between the brush portion and the pressing portion of the cap in a relatively rotatable state.

  According to the above configuration, when a force in the rotational direction is applied to the plurality of nonwoven fabrics interposed between the brush portion and the presser portion of the cap, the inner wall surface of the pipe is simultaneously or individually rotated by the plurality of nonwoven fabrics. The attached deposits can be scraped off satisfactorily.

The perspective view of the in-pipe cleaning tool which shows 1st Embodiment of this invention. Side view of partly cutaway when disassembling the in-pipe cleaning tool Partially cutaway side view of the main part when disassembling the in-pipe cleaning tool (a) and partially cutaway side view of the main part when assembled (b) The partially cutaway side view of the in-pipe cleaning tool which shows 2nd Embodiment of this invention

[First Embodiment]
FIGS. 1 to 3 show a pipe inner wall cleaning tool for a synthetic resin irrigation hose 1 which is an example of a fluid transport pipe, and is made of a synthetic resin capable of sliding contact with a hose inner wall surface (pipe inner wall surface) 1a. A irrigation hose 1 is provided with a pressure receiving portion (sometimes referred to as a pig or a head) 3 on the tip side (one end side) of the brush portion 2 in which the brush bristles 2a are radially implanted in a spiral state. The inside of the irrigation hose 1 is propelled by a pressure difference generated before and after the pressure receiving portion 3 in accordance with the supply of pressure water therein.

  The irrigation hose 1 has flexibility that can be folded into a flat shape, and has minute irrigation holes 1b at predetermined intervals in the hose axis direction (tube axis direction).

  As shown in FIG. 2, the brush portion 2 is formed by spirally twisting the metal wire in a state where the bristles 2a made of synthetic resin such as polyamide fiber are arranged between the bent metal wires. Of the spiral core material 2b that is configured and includes both the twisted metal wires, the base end portion where the bristles 2a are not implanted is attached to the annular locking portion for suspension. 2c is bent.

  In addition, a pair of nonwoven fabrics 3A and 3B having flexibility constituting the pressure receiving portion 3 can be relatively rotated at the distal end side portion 2d of the spiral core material 2b in which the brush bristle 2a group is not implanted. And the nonwoven fabrics 3A and 3B sheathed on the spiral core material 2b at the distal end portion 2d of the spiral core material 2b protruding from the through holes 3a and 3b of the nonwoven fabrics 3A and 3B. A synthetic resin cap 4 having a pressing portion 4A having a smaller diameter than the nonwoven fabrics 3A and 3B is screwed and fixed.

  As shown in FIG. 3, the total length L1 when the non-woven fabrics 3A and 3B are joined in a natural state is a pressing portion of the cap 4 screwed and fixed to the distal end portion of the distal end side portion 2d of the spiral core member 2b. It is comprised larger than the nonwoven fabric mounting length L2 between 4A and the front-end | tip of the bristle 2a group which faces this.

  Therefore, in a state where the cap 4 is screwed and fixed to the distal end portion of the distal end side portion 2d of the spiral core member 2b, both nonwoven fabrics are formed between the pressing portion 4A of the cap 4 and the distal end of the bristles 2a facing each other. 3A and 3B are in a compressed state, and the density of the nonwoven fabrics 3A and 3B is increased by this compression, and a pressure difference for propulsion can be reliably generated before and after the nonwoven fabrics 3A and 3B.

  As shown in FIG. 2, the outer diameter D1 of the nonwoven fabrics 3A and 3B and the outer diameter D2 of the rotation locus of the bristles 2a of the brush portion 2 are the same as or larger than the inner diameter D3 of the irrigation hose 1. The outer diameter D1 of both the nonwoven fabrics 3A and 3B is configured to be slightly larger than the outer diameter D2 of the rotation locus of the bristles 2a group.

  Even if the outer diameter D1 of both the nonwoven fabrics 3A and 3B is formed slightly larger than the inner diameter D3 of the irrigation hose 1 to be cleaned, the fibers located on the outer peripheral surface side of the nonwoven fabrics 3A and 3B are irrigated while being deformed. Since the hose 1 is slidably moved along the inner wall surface 1a of the hose 1, the hose is prevented from increasing in sliding contact with the inner wall surface 1a of the hose by the fibers on the outer peripheral surface side of the nonwoven fabrics 3A and 3B. Deposits such as mud adhered to the inner wall surface 1a can be scraped and removed.

  The center side of the front side surface 4b which is the most leading side when propelling the inside of the irrigation hose 1 with the pressure water on the side opposite to the pressing surface 4a of the pressing portion 4A of the cap 4 has a hemispherical surface at the tip side. The insertion guide body 4B is integrally formed, and the attachment hole 4c opened to the pressing surface 4a is configured to have a smaller diameter than the outer diameter of the distal end side portion 2d of the spiral core member 2b.

  Therefore, in a state where the cap 4 is screwed and fixed to the distal end portion of the distal end side portion 2d of the spiral core member 2b, the distal end portion of the distal end portion 2d of the spiral core member 2b is attached to the inner peripheral surface of the mounting hole 4c of the cap 4. Is screwed in a biting state.

As said both nonwoven fabrics 3A and 3B, a natural fiber or a synthetic fiber and the mixed fiber which mixed them can be used as a base material.
Examples of natural fibers include cotton, hemp, and wool, and examples of synthetic fibers include polyester, polyamide, polypropylene, acrylic, and rayon.

  Moreover, you may use what made abrasive particles, such as titanium dioxide, a silicon carbide, an alumina, a silica, adhere to both the said nonwoven fabrics 3A and 3B with resin.

  Both the nonwoven fabrics 3A and 3B are formed by punching a nonwoven fabric mat having a predetermined thickness into a cylindrical shape or a shape close thereto.

  In addition, in the said 1st Embodiment, although the said pressure receiving part 3 was comprised from two nonwoven fabrics 3A and 3B, you may comprise from one or three or more nonwoven fabrics.

[Second Embodiment]
In the first embodiment described above, the non-woven fabrics 3A and 3B constituting the pressure receiving portion 3 and the non-woven fabrics 3A and 3B between the one end of the spiral core material 2b of the brush portion 2 and the bristles 2a group. Although the cap 4 to compress is provided, as shown in FIG. 4, the nonwoven fabric 3A, 3B which comprises the said pressure receiving part 3 in each of the both ends of the spiral core material 2b of the said brush part 2, and both the said nonwoven fabric 3A , 3B may be provided with a cap 4 that compresses between the bristles 2a group.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Other Embodiments]
(1) In each of the above-described embodiments, the outer diameter D1 of both the nonwoven fabrics 3A and 3B and the outer diameter D2 of the rotation trajectory of the brush bristles 2a group of the brush portion 2 are the same as or equal to the inner diameter D3 of the irrigation hose 1 The outer diameter D1 of the nonwoven fabrics 3A and 3B or the outer diameter D2 of the rotation trajectory of the brush bristles 2a group of the brush part 2 is slightly smaller than the inner diameter D3 of the irrigation hose 1. May be implemented.

  (2) In each of the embodiments described above, when the cap 4 is screwed and fixed to the tip of the spiral core member 2b of the brush portion 2, the holding portion 4A of the cap 4 and the tip of the brush bristle 2a group facing the cap 4A Both nonwoven fabrics 3A and 3B were compressed to a set density between them, but when the nonwoven fabrics 3A and 3B were pre-shaped to a set density in a natural state, the nonwoven fabrics 3A and 3B were not held or compressed Thus, the brush core 2 may be rotatably mounted on the spiral core member 2b.

  (3) In each of the above-described embodiments, by adjusting the screwing of the cap 4 to the spiral core material 2b of the brush portion 2, between the pressing portion 4A of the cap 4 and the tip of the brush bristle 2a group facing it. You may comprise so that the compression state of both the nonwoven fabrics 3A and 3B located can be changed.

  (4) In each of the above-described embodiments, the bristles 2a of the brush portion 2 are radially planted in a spiral state. The bristles 2a are radially arranged at a predetermined pitch in the circumferential direction and the axial direction. You may plant it.

  (5) In the above-described embodiments, the pipe inner wall cleaning tool for the irrigation hose 1 has been described. However, it can be used as a pipe inner wall cleaning tool for fluid transport hoses other than the irrigation hose and fluid transport pipes.

1 Fluid transport pipe (irrigation hose)
1a Pipe inner wall surface (hose inner wall surface)
2 Brush part 2a Brush hair 3 Pressure receiving part 3A Non-woven fabric 3B Non-woven fabric 4 Cap 4A Presser

Claims (5)

A pressure receiving portion is provided on one end side of the brush portion that is radially provided with a bristle group that can be brought into sliding contact with the inner wall surface of the fluid transport tube, and the inside of the fluid transport tube is propelled by a pressure difference generated before and after the pressure receiving portion. A pipe inner wall cleaning tool configured as follows:
A pipe inner wall cleaning tool in which the pressure receiving portion is formed of a flexible nonwoven fabric.   The pipe inner wall cleaning tool according to claim 1, wherein the outer diameter of the non-woven fabric and the outer diameter of the rotation trajectory of the brush portion are configured to be the same diameter or larger than the inner diameter of the fluid transport pipe.   The pipe inner wall cleaning tool according to claim 1 or 2, wherein the nonwoven fabric is attached in a compressed state.   The non-woven fabric covered with the spiral core material can be compressed between the bristle group and the outer diameter of the non-woven fabric at the tip of the spiral core material sandwiching and holding the brush hair group of the brush portion. The pipe inner wall cleaning tool according to claim 3, wherein a cap having a pressing part is screwed and fixed.   The pipe inner wall cleaning tool according to claim 4, wherein a plurality of non-woven fabrics constituting the pressure receiving portion are interposed between the brush portion and the holding portion of the cap in a relatively rotatable state.

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